[libata sata_sil24] add support for 3131/3531

This patch adds support for sil_3131 and sil_3531.  Both are
identical to 3124 except that they have only one port.  Bits 30 and 31
of ata_port_info->host_flags is used to encode available port numbers.
Version number is bumped to 0.22.

Edward Falk supplied all the necessary information and preliminary
patch.

Signed-off-by: Tejun Heo <htejun@gmail.com>

1 files changed, 30 insertions, 8 deletions

diff --git a/drivers/scsi/sata_sil24.c b/drivers/scsi/sata_sil24.c
index dffa13c84639..19857814d69f 100644
--- a/drivers/scsi/sata_sil24.c
+++ b/drivers/scsi/sata_sil24.c
@@ -196,6 +196,7 @@ enum {
         /* board id */
         BID_SIL3124             = 0,
         BID_SIL3132             = 1,
+        BID_SIL3131             = 2,
 
         IRQ_STAT_4PORTS         = 0xf,
 };
@@ -242,6 +243,8 @@ static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 static struct pci_device_id sil24_pci_tbl[] = {
         { 0x1095, 0x3124, PCI_ANY_ID, PCI_ANY_ID, 0, 0, BID_SIL3124 },
         { 0x1095, 0x3132, PCI_ANY_ID, PCI_ANY_ID, 0, 0, BID_SIL3132 },
+        { 0x1095, 0x3131, PCI_ANY_ID, PCI_ANY_ID, 0, 0, BID_SIL3131 },
+        { 0x1095, 0x3531, PCI_ANY_ID, PCI_ANY_ID, 0, 0, BID_SIL3131 },
         { } /* terminate list */
 };
 
@@ -300,13 +303,20 @@ static struct ata_port_operations sil24_ops = {
         .host_stop              = sil24_host_stop,
 };
 
+/*
+ * Use bits 30-31 of host_flags to encode available port numbers.
+ * Current maxium is 4.
+ */
+#define SIL24_NPORTS2FLAG(nports)       ((((unsigned)(nports) - 1) & 0x3) << 30)
+#define SIL24_FLAG2NPORTS(flag)         ((((flag) >> 30) & 0x3) + 1)
+
 static struct ata_port_info sil24_port_info[] = {
         /* sil_3124 */
         {
                 .sht            = &sil24_sht,
                 .host_flags     = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
                                   ATA_FLAG_SATA_RESET | ATA_FLAG_MMIO |
-                                  ATA_FLAG_PIO_DMA,
+                                  ATA_FLAG_PIO_DMA | SIL24_NPORTS2FLAG(4),
                 .pio_mask       = 0x1f,                 /* pio0-4 */
                 .mwdma_mask     = 0x07,                 /* mwdma0-2 */
                 .udma_mask      = 0x3f,                 /* udma0-5 */
@@ -317,7 +327,18 @@ static struct ata_port_info sil24_port_info[] = {
                 .sht            = &sil24_sht,
                 .host_flags     = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
                                   ATA_FLAG_SATA_RESET | ATA_FLAG_MMIO |
-                                  ATA_FLAG_PIO_DMA,
+                                  ATA_FLAG_PIO_DMA | SIL24_NPORTS2FLAG(2),
+                .pio_mask       = 0x1f,                 /* pio0-4 */
+                .mwdma_mask     = 0x07,                 /* mwdma0-2 */
+                .udma_mask      = 0x3f,                 /* udma0-5 */
+                .port_ops       = &sil24_ops,
+        },
+        /* sil_3131/sil_3531 */
+        {
+                .sht            = &sil24_sht,
+                .host_flags     = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
+                                  ATA_FLAG_SATA_RESET | ATA_FLAG_MMIO |
+                                  ATA_FLAG_PIO_DMA | SIL24_NPORTS2FLAG(1),
                 .pio_mask       = 0x1f,                 /* pio0-4 */
                 .mwdma_mask     = 0x07,                 /* mwdma0-2 */
                 .udma_mask      = 0x3f,                 /* udma0-5 */
@@ -665,6 +686,7 @@ static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 {
         static int printed_version = 0;
         unsigned int board_id = (unsigned int)ent->driver_data;
+        struct ata_port_info *pinfo = &sil24_port_info[board_id];
         struct ata_probe_ent *probe_ent = NULL;
         struct sil24_host_priv *hpriv = NULL;
         void *host_base = NULL, *port_base = NULL;
@@ -705,12 +727,12 @@ static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
         probe_ent->dev = pci_dev_to_dev(pdev);
         INIT_LIST_HEAD(&probe_ent->node);
 
-        probe_ent->sht          = sil24_port_info[board_id].sht;
-        probe_ent->host_flags   = sil24_port_info[board_id].host_flags;
-        probe_ent->pio_mask     = sil24_port_info[board_id].pio_mask;
-        probe_ent->udma_mask    = sil24_port_info[board_id].udma_mask;
-        probe_ent->port_ops     = sil24_port_info[board_id].port_ops;
-        probe_ent->n_ports      = (board_id == BID_SIL3124) ? 4 : 2;
+        probe_ent->sht          = pinfo->sht;
+        probe_ent->host_flags   = pinfo->host_flags;
+        probe_ent->pio_mask     = pinfo->pio_mask;
+        probe_ent->udma_mask    = pinfo->udma_mask;
+        probe_ent->port_ops     = pinfo->port_ops;
+        probe_ent->n_ports      = SIL24_FLAG2NPORTS(pinfo->host_flags);
 
         probe_ent->irq = pdev->irq;
         probe_ent->irq_flags = SA_SHIRQ;